<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row :gutter="10">
        <el-col :span="6">
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand" v-slot="scope">
          <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children"
            :key="item1.id">
            <!-- 渲染一级权限 -->
            <el-col :span="5">
              <el-tag closable="" @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>
            <!-- 渲染二级权限 -->
            <el-col :span="19">
              <!-- 通过 for 循环 嵌套渲染二级权限 -->
              <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children"
                :key="item2.id">
                <el-col :span="6">
                  <el-tag type="success" closable="" @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}
                  </el-tag>
                </el-col>
                <!-- 三级权限 -->
                <el-col :span="18">
                  <el-tag v-for="(item3, i3) in item2.children" :key="item3.id" type="warning" closable=""
                    @close="removeRightById(scope.row, item3.id)">
                    {{ item3.authName }}
                  </el-tag>
                </el-col>
              </el-row>
            </el-col>
          </el-row>
          <!-- <pre>{{scope.row}}</pre> -->
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" v-slot="scope" width="300px">
          <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
          <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
          <el-button size="mini" type="warning" icon="el-icon-setting" 
          @click="showSetRightDialog(scope.row)">分配权限</el-button>
        </el-table-column>
      </el-table>
    </el-card>


    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" 
    width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" 
      show-checkbox node-key="id" default-expand-all
      :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>
<script>
  export default {
    data() {
      return {
        // 所有角色列表数据
        rolelist: [],
        // 控制修改用户对话框的显示与隐藏
        editDialogVisible: true,
        // 控制分配权限对话框的现实与隐藏
        setRightDialogVisible:false,
        // 所有权限的数据
        rightslist:[],
        // 树形控件的属性绑定对象
        treeProps:{
          // 看到的是哪个属性
          label:'authName',
          // 父子嵌套
          children: 'children'
        },
        // 默认选中的节点id值数组
        defKeys:[],
        // 当前即将分配权限的角色id
        roleId:''
      };
    },
    created() {
      this.getRolesList();
    },
    methods: {
      // 获取所有角色的列表
      getRolesList() {
        this.$http.get("roles").then((res) => {
          if (res.data.meta.status !== 200) {
            return this.$message.error("获取角色列表失败！");
          } else {
            this.rolelist = res.data.data;
            // console.log(this.rolelist);
          }
        });
      },
      // 根据id删除对应的权限
      removeRightById(role, rightId) {
        // 弹框确认是否删除
        this.$confirm("此操作将永久删除该文件, 是否继续?", "提示", {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        })
          .catch((err) => {
            return err;
          })
          .then((confirmResult) => {
            if (confirmResult !== "confirm") {
              this.$message.info("取消了删除");
            } else {
              this.$http
                .delete(`roles/${role.id}/rights/${rightId}`)
                .then((res) => {
                  if (res.data.meta.status !== 200) {
                    return this.$message.error("删除权限失败");
                  } else {
                    // this.getRolesList()
                    role.children = res.data.data;
                  }
                });
            }
          });
      },
      // 展示分配权限的对话框
      showSetRightDialog(role) {
        this.roleId = role.id
        // 获取所有权限列表
        this.$http.get('rights/tree')
        .then((res)=>{
          if (res.data.meta.status !== 200) {
            return this.$message.error('获取权限数据失败！')
          } else {
            // 获取到的全线数据保存到data中
            this.rightslist = res.data.data
            console.log(this.rightslist)
          }
        })
        // 递归获取三级节点的id
        this.getLeafKeys(role,this.defKeys)
        this.setRightDialogVisible = true
      },
      // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
      getLeafKeys(node,arr){
        // 如果当前node节点不包含child属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        } else {
          node.children.forEach((item )=> {
            this.getLeafKeys(item,arr)
          });
        }
      },
      // 监听分配权限对话框的关闭事件
      setRightDialogClosed(){
        this.defKeys = []
      },
      // 电机为角色分配权限
      allotRights(){
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr = keys.join(',')

        this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
        .then((res)=>{
          if (res.data.meta.status !==200) {
            return this.$message.error('分配权限失败！')
          } else {
            this.$message.success('分配权限成功！')
            this.getRolesList()
            this.setRightDialogVisible = false
          }
        })
      }
    },
  };
</script>
<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }
</style>